Pressure apparatus for the drawing mechanisms for textile rovings



Dec. 22, 1936. F A ABLANCAS 2,065,115

- PRESSURE APPARATUS FOR. THE DRAWING MECHANISMS FOR TEXTILE ROVINGS Filed Nov. 23, 1953 2 Sheets-Sheet frwanr I Zrrzazzda Qmalhw 59 UM+M 2 Sheets-Sheet 2 flll'ormsya F. CA$ABLANCA$ PRESSURE APPARATUS FOR THE DRAWING MECHANISMS FOR TEXTILE ROVINGS Dec. 22, 1936.

Filed Nov. 25, 1935 firm awalzanaw J ww n qkm v Patented Dec. 22, was

UNETED ST QFFlCE PRESSURE APPARATUS FOR THE DRAWING MECHANISMS FOR TEXTILE ROVHTGS Fernando Casablancas, Sabadell, Spain 2 Claims.

The object of this'invention is improvements introduced in the saddles and pressure rods for drawing mechanisms, and which allow the loading at will of two pairs of cylinders or only one of same.

In the drawing mechanisms used in spinning or preparing machines, it occurs that in many cases if the thread breaks, the fibres delivered by the drawing cylinders roll themselves on these cylinders and it is necessary to raise the top front cylinder in order to remove these knotted fibres.

In all those drawing mechanisms in which there is employed a pressure saddle which loads simultaneously the two front pairs of cylinders,

it happens that in order to withdraw the front cylinder it is necessary to unload the two pairs of cylinders, Which in many cases becomes troublesome because the pair of back cylinders ceases to take up the roving and this becomes slack and knotted.

The improvements set forth in this invention avoid this trouble and allow the obtaining of a pressure apparatus with a saddle which loads simultaneously two pairs of cylinders, which saddle is coupled in such a way with the pressure rod that if the saddle is pushed backward resting only on the back pair of cylinders it remains locked with the pressure rod and due to the effect of this locking instead of falling it continues exercising pressure on the back cylinder.

This invention is applicable to drawing mechanisms in which there is used a pressure saddle for loading the cylinders where the pressure rod is capable of exerting a longitudinal pull on the rod, but especially it has a great utility on modern spinning machines in which there are combined for each spindle two or more drawing mechanisms and a mechanism of false twist intermediate, in such a way that the sliver or roving undergoes various successive drafts and between them a false twist which in general takes place simultaneously with one of the drafts.

The improved device is especially desirable in this type of machine when the thread breaks in the front mechanism, and the fibres wind themselves around the front drawing cylinders that the top front drawing cylinder may be lifted to clean the same without unloading the back cylinders. The fibres or roving delivered by the first drawing mechanism and the false twist tube at present would not be carried forwardly by the back cylinders but the same would only lend toward knotting the roving, and thus prevent the continued operation of the machine as now shown and described.

The invention consists briefly in arranging in the pressure saddle two shafts or pins for the articulation of this saddle to the pressure rod, combined in such a way that in the normal working of the machine, that is to say when the saddle loads upon the two pairs of cylinders there is utilized only one of these shafts or pins to transmit to the saddle the force of the pressure rod but if the saddle is run backwards in such a Way that it rests solely on the back cylinder and its 10 back part remains in the air, the other pin puts itself in contact with the pressure rod and the saddle remains locked with this rod and loading only the back cylinder.

In the adjoining drawings there is shown a form of execution of this invention.

Figure 1 shows the application of the invention to a high draft mechanism with belts.

Figure 2 shows in similar way the application of the invention to a multiple draft mechanism, that is to say, composed of two consecutive drawing mechanisms and an intermediate false twist mechanism.

In Figure 3 there is shown in a larger scale the articulation of the pressure saddle and the pressure rod when the saddle loads on the two pairs of cylinders and In Figure 4 there is shown the articulation of the saddle to the pressure rod when the saddle has been moved backwards and loads only the back pair of cylinders.

In the example of Figure 1 the drawing mechanism is formed by three pairs of cylinders of which the intermediate pair I I--l2 carry endless belts for guiding the sliver or roving 4 to the drawing or front cylinders I5 I 6. The pressure saddle 8 loads both pairs of cylinders and is connected by a pressure rod 9 and a pressure device II] of any appropriate type.

The multiple draft mechanism of Figure 2 includes a first drawing mechanism or back mechanism of any convenient type, which in its whole is marked in the drawings with the number I a second drawing mechanism or front mechanism marked with the Figure 2 and between both a false twist mechanism 3. The second drawing mechanism 2 is composed of two pairs of cylinders of which the back I II2 carry endless belts and these two pairs of cylinders receive pressure at the same time through a saddle 8 a pressure rod 9 and a pressure device I0. As can be understood the arrangement of the drawing mechanisms in themselves and that of the pressure apparatus does not constitute the object of this patent and consequently there may be employed any type of drawing mechanism and any type of pressure. apparatus.

As is seen in more detail in Figures 3 and 4 the pressure saddle 8 presents for the articulation of the rod 9 a hollow ll of greater dimensions than the usual ones and in this hollow the saddle is traversed by two pins or articulation shafts |8l9. The pressure rod 9 in its turn is bent almost in right angle 20 around the pin 19 and forms an eye or closed ring which surrounds the pin I8.

The arrangement is such that during the normal working of the apparatus, as shown in Figure 3, the pressure rod 9 does not touch the pin [9 and in exchange rests on the top part of the pin I8 transmitting to this pin the force of the weight or of the pressure device I0.

On the other hand when it is desired to unload the front cylinders -lB-lES in order to be able to raise the cylinder l5 it is sufiicient to raise very lightly the saddle 8 and push same backwards in order that it 'may take up the position shown in Figure 4 in which it loads only on the cylinders ll--l2. On effecting this displacement of the pressure saddle 8 the curved part in 20 of the pressure rod 9 rests on the pin l9 transmitting to this pin the force of the pressure device and in exchange due to the different position the saddle has taken with relation to the rod, the pin 18 rests on the lower part of the eye 2| of the rod, in this way locking together the pressure saddle and the rod which act together as one solid rigid piece.

In this position of the pressure saddle, the top cylinder I5 may be easily withdrawn and notwithstanding this, the back cylinders lll2 and the belts [3 if these exist, continue turning and drawing or absorbing the roving 4 which is delivered by the feeding cylinders or by the first drawing mechanism l and the false twist mechanism 3, thus avoiding that this roving 4 becomes entangled in the tube of false twist and causes trouble in the working. Whilst the top cylinder I5 is being cleaned, the roving 4 delivered by the belts l3 falls upon the lower cylinder l6 and at times becomes wound round this cylinder or the lower cleaning brush, but as these elements are very accessible it is easy to clean same and to re-establish the proper working of the mechanism when the top cylinder is again placed in position.

Once this cylinder is placed in position it is sufiicient to take the handle of the saddle 8 in the hand and draw this forward until it takes again the position of the Figure 3, in which it again transmits simultaneously the pressure to the two pairs of cylinders The saddle 8 may present in its lower part a notch 22 through which it rests on the back cylinder H on adopting the position of Figure 4.

I claim: I

1. A pressure apparatus for the drawing mechanisms for textile rovings having a pair of front and back drawing cylinders comprising a pres sure saddle to rest initially upon the upper front and back cylinders, a pair of pins mounted and spaced apart upon the saddle, and a pressure rod having one end bent at substantially a right angle to pass over and adjacent to one of said pins and terminating in an eye to engage the other pin whereby the rod transmits pressure through the latter pin to load the front and back cylinders and movement of the rod into contact with both pins permits withdrawal of the upper front cylinder without unloading the back'cylinders.

wall engaging the upper portion of the second abutment. member. in the'rear position of the saddle totransmit pressure through the saddle to the rear upper roller, said rod having a third wall for abutting against'an under portion of the first abutment member when the saddleis in the rear position to permit said notch to contact with the upper back roller and to arrest rotation of the saddle about the same.

' FERNANDO CASABLANCAS. 

